API Pond & Waterfall CleanerAPI Pond & Waterfall Cleaner Designed to use the power of active oxygen to deep clean on contact pond surfaces, waterfalls, fountains, and bird baths. Use as needed to maintain a clean, clear pond or outdoor water feature. Key Features: Deep cleans on contact Cleans pond surfaces, waterfalls, & decorative rocks Keeps fountains and birdbaths clean Safe for all fish and aquatic plants